Nathaniel thompson



@uiten tstes steu't @fitta NATHANIEL THOMPSON, OF FARMINGTON, MICHIGAN. Letters Patent No. 71,820, dated December 3, 186i?.

IMPROVEMENT IN DEVICE FOR TRANSMITTING MOTION.

tite Semelle refereren te it these ettereeteut une meting part ef the seme.

TO ALL WHOM IT MAY CONCERN: y

Be it known that I, NATHANIEL THOMPSON, of Farmington, in the county of Oakland, and State of Michigan, have invented a newand improved Means for Transmitting and Converting Motion; and that the following description, taken in connection with the accompanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nature und principles of my said improvements, by which my invention may be distinguished from all others of a siniilar class, together with such parts ns I claim, and desire to have secured to me by Letters Patent.

This invention relates to anew and improved means for transmitting and converting motion, a recipro cating motion being converted into a rotary one, and 'vice versa. The invention is an improvement on theA double rack and pinion, which is an old and wellknown means for imperfectly eectingthe result specified,- but which, by my improvement. is made to operate in a satisfactory manner. i In the accompanying sheet of drawings- Figure 1 is a side view of my invention. v

Figure 2 a section of the same, taken in the line :e x, fig. 1,

Figure 3, a side view of a portion of the same.

Figure 4, a section of fig. 3, taken in the line y y.

Similar letters of reference indicate like parts.

The frame or main portion of the device is composed of two parts, A B, the former, A, having a straight bar, a, and a part composed of two parallel bars b b, connected at their ends so as to form a rectangular interior, as shown in fig. 1. The part B of the frame is composed of two parallel racks c c, connected by semi# circular ends, d d, which are smooth, or not provided withteeth, as shown in iig. 1. 4This partB of the frame is connected to the part at one end by a bolt, e, which passes through an oblique slot, f, in one end ot` the part `A-of the frame, and connected at the opposite end by a projection, g, which ts in an oblique slot, h, in the part A, said projection g having a cap-plate, t', secured to it, the ends of which lap over the edges of slot It. C represents a slide, which is fitted between the bars b b of the part of the frame, and allowed to slide freely back and forth, and D is a. pinion, which gears alternately into the racks c c, and has-its shaft E passing through the slide C, the shaft being allowed to turn freely therein. F is a ring, which encompasses the ,shaft E, is secured to the slide C, by a screw, j,vand has a bar, 7c, projecting from it, which passes underneath and lworks in a groove in the under side of the cap-plate ,'(see figs.l 1 and 4.) This bar c performs an important function, to wit, as the slide C or the part A of the frame, either one of them, is moved or has a reciprocating motion imparted to it, the friction of the bar k will move the part B of the frame, and owing to the projec tion g working in the oblique slot h, and the bolt e working in the oblique slot f, the part B of the frame will he moved obliquely in a lateral direction, and the racks a a thrown alternately in gear with the pinion D;

Thus it will be seen that by this simple means motion may be transmitted and converted, a rotary motion transmitted from a reciprocating one, and 'vice 'vet-ea. In order to insure the bar k working at all times with a requisite degree of friction underneath cap-plate i, a small plate, l, which is fitted in the projection g, is made 4to press against the bar k by a pin, m, which rests on or is in contact with a spring, et, attached to the semicircular end d, of the part B of the frame, on which the projection gis formed. In order to prevent undue friction on account of this spring, I insert two small bent rods o o in the projectionlg, one part or end of which is in contact with the spring n, andthe other parts or ends extend upward, at oppositeV ends or sides of the projection g, so that at the termination of each oblique lateral movement 0f the part B, one of the rods, o, is broughtln contact with the corresponding end of the slot h, and the bar k relieved from the pressure of the spring n. The part B is prevented from casually moving by means of a. small spring, p, attached to B, and

having its outer end fitted in an angle of slot h, (see g. 1.)

Having thus described my invention, I claim as new, and desire to secure by Letters Patent;-

1. The arrangement of the parts A B, parallel bars b b, racks c 1.','slide O, pinion D, with its shaft E, plate F, and rod k, as herein described for the purpose specified. j s

2. Giving the lateral oblique movement to the part B of the frame by means of the oblique slots f h, and

the bolt e, und projection y, Working respectively therein, the bar lc, connected with the slide C, and the pro;

`jection g of the part B, substantially as and for the purpose set forth.

v 3. The spring n, arrang'eii or applied substantially as shown bent rods o o, arrangedvin relation with the spring n, projection g, the bar 7c ofthe -presslre when required.

l The above specification of my invention signed by me, this 3d day o'July, 1867.

NATHANIEL THOMPSON. Witnesses: W Y I .WM. F. McNAMARA,

J. A. SERVICE.

and the ends of the oblique slot la, to relieve to exert n. pressureon the bar and the 

